Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Optimizely is an experimentation platform that helps developers build and run A/B tests on websites.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.